Water-cooled grate.



No. 821,500. i PATENTED MAY 22, 1906.

A. E. JOHNSON. WATER COLEDGRATE.

APPLIGAT'VION FILED DEU. 2, .10G/f.

-2 SHEETS-SHEET ly l l l I j @pfff/WM A. E. JUHNSUN.

WATER COOLED GRATE.

APPLIGATION PILB 1120.2, 1904.

2 SHEETS-SHEET 2.

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reference being had nu fai ALFRED R. JOHNsON, or JOHNsoN FURN-AOR RADO s PRiNes, COLORADO.

RA Nr rien.

DENVER, COLORADO, AssieNOR ro THR 'AND nNeiNnnRiNe OOMPANY, or OOLO-V wATER-eootsn aaai-s..

Specification of Letters Patent.

Patented May 2e, 190e.

Application filed DeeemberZ. 1904. Serial-No. 235 254.

'l'o LM wiz/0m t may concern:

Beit known that I, ALFRED E. JOHNSON, a citizen of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Water-Cooled Grates; and I do declare the following to and exact description'of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, to the accompanying I drawings, and to the iigures of reference marked thereon, which form apart of this specification.

My invention relatesto improvements in water-cooled grates of the class set forthin Patent N o. 778,74Q, issued to me December 27,1904.

- In my present invention I provide vmeans for -`ntroducingfcooling-water or other iluid preferably to the two centrally-loeated bars of the grate and forming such a connection between -these'bars and the other bars that the cooling-water flows from the central bars into and through the hollowr bars on each side, whereby there are but twe discharges .of water from the entire grate', the arrangefrom each of duits, leaving the outer bars on opposite sides. In this way the thermometer will indicate the temperature of the Water, and thus indicate the condition of the material on the ate. gr.li-Iaving brieiiy outlined my improved construction, Vas well as the function it is intended to perform, I will proceed Vto describe the same in detail, reference being made to the accompanying drawings, in which is illustrated an embodiment thereof. In the drawings, Figure 1 is a fra mentary front view .of a furnace equipped wit be a Jfull, clear,

ythe pipe 16 enters .a hollow proved construction` vo1 grateI Fig. 2 is a ragmentary sectiontakenthrough the eme, showing one of the grate-barsdn place. Iig. 3 is a horizontal section taken through a number of the grate-bars.

The same reference characters indicate thesame parts in all the views.

Let the numeral5 designate the iront wall, and 6 the rear wail, of the fire-box or fuehreceptacle of a furnace or other apparatus Where it is desirable to have a 'water-cooled rate. In the front and rear walls of this rebox, which walls may be of any suitable f construction, is mounted a number of hollow revoluble bars 8, whose rear extremities are closed by screw-plugs 9. These hollow gratebars arel provided with auel-sitipportingl del vices 10, having iingersprojecting in opposite directions for the purpose of supporting the fuel'upon the grate and for the further purpose of breaking up the clinkersas the grate-bars are agitated. These -gratebars protrude from the forward supportlng-plates 12 in front, `and into these forward ends are inserted short pipes 13 providedl with laterally-extending branches 14, .yvhich lead to the ladjacent hollow grate-barst() allow the water to circulate from one bar tothe other. The

outer extremity of each branch 14 is secured to the adjacent end ofthe pipe 418 of the next bar, andso on until the extreme bar on each side is reached, where the short-pipe 13 is provided with a shortlateral extension 13, conr- `niunicating with a conduit 15, through which the water may be carried by means ofsuitable pressure to any desired elevation in lorder to reuse it for cooling the grate or other purposes. Passing through each short pipe 13 and extending inwardly nearly to the rear extremity of. each hollow grate-bar is an open-ended pipe 1-6. The outer extremity of each pipe 16 communicates with the outer extremity of a lateral branch or extension 14 of'thepipes 13 except in the case of the pipes 13, where introduced Ato .the outer extremity of pllate 17, into c the water is originally grate. lIn this case the which the cooling-Water is dis downwardly-extending pipe 18, controlled by a valve 19. water to the grate may lead from the rece tacle (not shown) located any desired disarged from av The pipes 18 for introducing IOQ los

tance above to which the discharge-pipes 15 lead er from an original water-source, as may be desired. tached a thermometer 20 Jfor indicating the temperature of the cooling-water as it leaves the grate.

Attention is called to the fact vthat each hollow plate 17 is secured to the head or flange extremity 13" of the. pipe 13V by means of bolts 13d. To each hollow grate-bar S 1s secured a stuI'ling-box 21, composed of two members 22 and 23. T he member-22 is secured to the hollow grate-bar by a bolt 24, while the members 22 and 23 are connected by bolts 25. roundthe outer extremity of the hollow gratebar 8. A spit-able 'packing material 26 is in.- terposed between the outer extremity of the hollow grate-bar and the member 23, said packing material surrounding the short pipe 13 in order to make a water-tight joint.

Tothemember 22 ofeach stulling-box is pivotally connected, as shown at 28, an operating-lever 27, which normally engages a recess formed in a rack-plate'QQ. When it is desired to shake any grate-bar, the operating-lever Yis pulled outwardly from engagement with the rack, when the grate-bar may be rotated for the purpose oi' breaking up the clinkers or' lreeing the ash on the grate or for both purposes, according to the necessities of the case.

From the foregoing description the use and operation of my improved grate will be readily understood. All that is necessary in the use of' the grate is to turn on a suitable quantity of water by opening the valves 1) of the supply-pipes 18, whereby the water enters the two centrally-located pipes of the gratey and passes therefrom to the other pipes in succession inopposite directions and` nally escapes through the outlet-pipes 15, as heretofore explained. The thermometers will indicate the temperature of the water,

f andftherefore to some extent the condition of the material on the grate.

Attention is called tothe fact that I dol not limit the invention to the exact construction shown in the drawings; but that illustrated is deemed thoroughly practicable.

Of course the number of' pipes to which the Water is delivered may e varied according to the size of the grate,- and consequently the numberof hollow bars with which it is provided. It is also evidentth'at the water may be originally introduced toa single centrallylocated bar and the saidbar connected with the 'bars on both sides, whereby the water -Lrnay be made to flow in both directions from the single centrally-locatedbar.

The lateral extensions' oftge pipes 13 are provided with openmgs normallyv closed by screw-plugs 30. These openings are located directlyppo'site the open extremities of the o; pipes 16, .and

the 'screw-plugs maybe rerlo each branch pipe 15 is at-v The members 22 and 23 suri moved in order to give access to the pipes l@ when for any purpose such access may be necessary, as in case a pipe 1'6 should become clogged up or stopped.

1. A grate composed ol" hollow revoluble bars, long o en-ended stationary water-pipes located wit in the bars, means lor 'introducing water to one of the said pipes, and short stationary pipes each entering the extremity of a hollow grate-bar at one end of the grate and surrounding the corresponding extremity of the water-pipe therein, the said short pipes having lateral extensions, each long l water-pipe after the one through which the l water enters the grate, communicating at one l end with the corresponding lateral extension of one ot' said short pipes, and at itsother end with the interior of the grate-bar.

A grate composed of a number of hollow revoluble bars, long open-ended water-pipes within the bars and protruding from their .extremities at one end of the grate, short stationary pipes each entering the end of a gratebar at one end of the grate and surrounding the extremity of the water-pipe therein, and means for introducing water...t'o lone of the having lateral extensions, eachlong waterpipe after the one through which the water enters the grate, communicating at one end with the adjacent lateral extension of one ol said short pipes, and at its other end with the interior of the grate-bar;rr Y

3. A grate composed of a number of hollow revoluble bars, long open-ended water-pipes located within the bars and protruding therefrom at one end of the grate, short stationary pipes each entering the extremity of a gratebar at one end of the grate, surrounding` the protruding extremity of the therein and communicating with the gratebar, means for forming a water-tight joint between the -short pipes and the hollow reveral extensions,eachlong water-pipe after the one through which the water enters the adjacent lateral extension of one 'of said short pipes, and at its other end with the interior of the grate-bar. v

4. A grate-bar composed of a number of enteringthe'forward' extremities of the' respective bars and communicating with the latterplong open-ended pipes located in the hollow bars, and means for delivering cooling fluid to the forward extremity of one of the pipes within the bars under suhcient lpressure to cause the fluid to flow through a number of open-ended pipesin succession and tionary pipes haying lateral extensions, nach klong open-ended pipe after theorie-through;

Having thus desribed my invention, what' pipes within the hollow bars,"the short pipes- IOO IIC

, oluble bars, the 'short pipes having latgrate, communicating at one end with the) 1 -ollow`revoluble bars, short stationary pipes back through the hollow bars, the short stai eating at one end i-teiisions long open-ended water-pipes located revolublo bars, short sta ing Water to one of the long oithe adjacent short pipes, the said plates haveiitering the forward ex tromity of yto travel through the grate-bars, each long which the water enters the grate, communil with the adjacent lateral extension of one of said short pi es? and at ijts other end with the interior cip the grate- 5. A grate composed of a number of hollow revoluble bars, short stationary pipes entering the forward extremities of the bars and communicating therewith, the short pipes Within the hollow hars, and means for delivering a cooling fluid to one olE the pipes within thevhollow bars under suflcient pressure to cause the fluid to circulate through. the bars, each long pipe within a hollow bar after the one through which tlio fluid enters the .j grate,A communicating at one end adjacent lateral extension of short-pipes, and at its other terior ofV the grate-bar.

' 6d A grate composed of a number revoluble bars, short stationary pi with the l one of said end, with the inl oi hollow l pes ezieh l a bar mld communicatingtherewith, the short pipes being provided with protruding lateral `exi l `within the hollow bars, and means for delivering water under pressure. to one or more of the enter-pipes,within the hollow bars, each long water-pipe after the one through which the water enters the grate, communicating at one end with the adjacent lateral extension of one of said short pipes and at its other end with the interior of the grate-bar.

T i A grate composed olE a number of hollow tionary pipes each entering the forward extremity of a bar and communicating therewith, the short pippes being provided with protruding lateral extensions, long open ended pipes located Within the hollow bars7 means for introducopenended pipes under such pressure that-the water is made water-pipe after the one through which the wete-i:l enters the grate, eommunieatiiig` at one end with the adjacent lateral extension of one 'of said short pipes, and at its other end with the interior of the grate-bar. v8. grate coniposed of hollow revoluble bars, long stationary waterf pipes located Within the bars and protruding 'therefrom at one end of the grate, short stationary pipes each enteringa grate-bar at one end of the grate and surrounding the protruding eX- tremity ol the water-pipe therein, the outer extremity of each short pipe oeing expanded to forni a plate, .the shortfpipeshaving lateral lextensions connected with theplates of ing openings to allow. the lateral extensions` to communicate with the long tw:iter-pipesor` l having lateral extensions, long pipes located the extensions of the is attached to the plates of thestationar or series of the grateb rs, the short pi es communicating with t e. gratebars which they enter, each long Water-pipe after theorie through which the water enters thel grate, communi; eating at one end with the adjacent later l extension of one ofsaid short pipes and at p ts other end with the interioroi the grate-bar.

9. A rate composed of a number of hollow 7o revolub e bars, long water --pipes located within the grate-bars, their forward extrennties protruding from the grate-bars, short stationary pipes ach entering thefo'rward extremity of a grate-bar, surrounding ,the protruding extremity of the-long waterrpipy therein, and Vcommunicating with. the grate-- bar, the short pipes having plates latV their forward extremities,` the 'short pipes beii: ig` also provided with lateral` extensions con- 8o neet-ed 'with the plates 'of adjacentv Sheri pipes except where thejwater` is origin-ally introduced, the plates ofj'fjr'thelast named pipes having openings forning a communi-h` cation between thewlateal extensions oftlie short pipes and the frward extremities of the long water-pipe i'thin thehollow bars", 'hert pipes having closable openings in line-with openiiigs-of the plates with which they are connected-and a oo number of supply-pipes -for introducing Water to a corresponding niiinber of the wateri pipes within the hollow` hars7 hollow plates' y pipesi` and surrounding ,the loiigiwater-pipes where o 5 the water is introduced,I` the supply-pipes' being connected with the hollow plates7 each A long water-pipe after the one through which the water enters the grate, communicating at one end witli-the adjacent lateral extenoo sion ofone of said short pipes and at its other; end-with the interior of the grate-bar 4 10. Agrate composed of a number of sets" o-r series of hollow lgrate-loars, a long open-"- ended fluid-pipe extending into each bar of 405 the grate', means for introducing cooling fluidi'l to one pipe of eaeh series of grate-bars, short" pipes each entering a hollow grate-bar at one end of the grate and surrounding the correspending extremity of the fluid-pipe there- UO in; each long fluid-pipe of each set or series of hollow hars afterthe one through which.f the water enters the grate, communicatingi at one end with the adjacent hiternl extension of one of said short pipes of the samenst f I5 grate-bars and at its-'other end with the interior of the grate-par.

In testimony whereof I afl'ix my signature in presence of two witnesses.

ALFRED E. Joi-iNsofN.-f Witnesses: A

.Diena NELSON., lim E. Utilities. 

